The Startling Effect of Diet on the Brain

The Startling Effects of Diet on the Brain

More and more research is highlighting the strong connection between the gut and the brain. For many years we’ve heard of the damage that can be done to our bodies by high fat and high sugar diets. Now, there is startling evidence that the effects on our bodies are only part of the story, with diet also able to cause changes in the brain.

New research has found that a diet high in fat and sugar causes changes in the gut bacteria that seem to be related to a significant loss of cognitive flexibility, which is the power to adapt to change. The effect was strongest on a high sugar diet, which also impaired long and short-term memory.

The research was conducted on mice (because of their biological and physiological similarities to humans). After being fed different diets, they were given a variety of tests to explore the changes in their mental and physical function, as well as the changes in different types of gut bacteria.

After four weeks on a high fat or high sugar diet, there was a significant decline in the mental and physical function of the mice. One of the most profound changes was in cognitive flexibility.

Magnussen explained cognitive flexibility in this way, ‘Think about driving home on a route that’s very familiar to you, something you’re used to doing. Then one day that road is closed and you suddenly have to find a new way home.’

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Someone with a high level of cognitive flexibility would quickly adapt by finding another way home, and remembering to use that same route the next morning. Someone with diminished cognitive flexibility would struggle to adapt to the change, and would likely have a slow, stressful trip home.

The mice used in the study were younger ones, who would typically have a greater capacity to resist the impact of changes to their gut bacteria, or microbiota. In older humans or animals whose biological system might not be as healthy, the effect of high sugar and high fat on cognitive function might be even stronger.

‘It’s increasingly clear that our gut bacteria, or mictrobiota, can communicate with the human brain,’ reported Kathy Magnussen, a professor at Oregon State University.

 This study backs up an abundance of previous research that has demonstrated the influence of food on the brain, and gives us another good reason to taper down on fat and sugar.

5 Comments

Carol

This is such poignant information for my family. Thank you so much! I’ve learned a lot through your posts on your site “Hey Sigmund”. This is practical and applicable advice !

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Noelle

Very interesting … I’ve had an interest in holistic mental/physical health for some time. The theory of the gut as tied to other parts of a person’s health has really grabbed me.

However, I wonder about one part of this article: you mention that studies see high sugar and high fat as similarly destructive of overall health. I agree about sugar (that is, processed sugars). However, from what I’ve read, the common wariness about high fat comes from a faulty lumping-together of ALL kinds of fats into one category, rather than distinguishing different kinds. That is, there is a huge difference in the consumption of processed fats (typical of modern American diets) and the traditional consumption of unprocessed plant and animal fats. Take the French, for example, who seem to have a generous approach to natural fats and yet don’t suffer negative consequences from it. I’d love to see this research taking more of these sorts of distinctions into account, and see how it affects the outcomes.

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The point of any ‘discipline’ is to teach, not to punish. (‘Disciple’ means student, follower, learner.)

Children don’t learn through punishment. They comply through punishment, but the mechanism is control and fear. 

The problem with this, is that the goal becomes avoiding us when things go wrong, rather than seeking us out. We can’t influence them if we’ve taught them to keep their messes hidden from us. 

We can’t guide our kiddos if they aren’t open to us, and they won’t be open to us if they are scared of what we will do. 

We all have an instinctive need to stay relationally safe. This means feeling free from rejection, shame, humiliation. The problem with traditional discipline is that it rejects and judges the child, rather than the behaviour. 

Hold them close, reject their behaviour. 

This makes it more likely that they will turn toward us instead of away from us. It opens the way for us to guide, lead, teach. It makes it safe for them to turn and face what’s happened so they can learn what they might do differently in the future.

Rather than, ‘How do I scare them out of bad behaviour?’ try, ‘How do I help them to do better next time?’ 

Is the way you respond to their messy decisions or behaviour more likely to drive them away from you in critical times or towards you? Let it be towards you.

This doesn’t mean giving a free pass on big behaviour. It means rather than leading through fear and shame, we lead through connection, conversation and education. 

The ‘consequence’ for big behaviour shouldn’t be punishment to make them feel bad, but the repairing of any damage so they can feel the good in who they are. It’s the conversation with you where they turn and face their behaviour. This will always be easier when they feel you loving them, and embracing who they are, even when you reject what they do.♥️
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#parent #parents #mindfulparenting #gentleparenting
Kununurra I’m so excited to be with you tonight. I’ll be giving you super practical ways to strengthen your kiddos and teens against all sorts and all levels of anxiety - big anxiety, little anxiety, anxiety about school, separation, trying new things - all of it. You’ll walk away with things you can do tonight - and I can’t wait! Afterwards we’ll have time for a chat where we can dive into your questions (my favourite part). This is a free event organised by the Parenting Connection WA (I love this organisation so much!). The link for tickets is in my story♥️
Hello Broome! Can’t wait to see you tonight. Tickets still available. The link is in my story. 

Thank you Parenting Connection WA for bringing me here and for the incredible work you do to support and strengthen families.♥️
What a weekend! Thank you Sydney for your open hearts, minds and arms this weekend at @resilientkidsconference. Your energy and warmth were everything.♥️
I LOVE being able to work with early childhood centres and schools. The most meaningful, enduring moments of growth and healing happen on those everyday moments kids have with their everyday adults - parents, carers, teachers. It takes a village doesn’t it.♥️

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